We have made our best effort to ensure that the data contained in
these reports is accurate. We note that there may be brief delays in
updating the reports as we receive new state submissions and we take
rulemaking action on plans. In order to assist us in providing
accurate information, we request that you contact us by clicking on the "Contact Us" link
near the top of this page with any comments regarding or corrections to the posted information, including
concerns about whether the entries reflect the most recent status.

Current and historical design value data can be found on the EPA Air Trends website
and the EPA Green Book contains comprehensive nonattainment area, designation status, and historical
information.